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HDMI

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HDMI stands for High Definition Multimedia Interface. It is a digital video and audio carrying connector that mandates HDCP copy protection. It is backwards compatible with DVI, meaning that you can input a DVI source to a HDMI capable display with the appropriate DVI to HDMI cable/adapter.

There are various revisions of HDMI, the table below (courtesy of http://en.wikipedia.org/wiki/HDMI#HDMI_and_high-definition_optical_media_players) highlights the differences:

HDMI revision 1.0 1.1 1.2/1.2a 1.3/1.3a/1.3b
Maximum signal bandwidth (MHz) 165 165 165 Yes
Maximum TMDS bandwidth (Gbit/s) 4.95 4.95 4.95 Yes
Maximum video bandwidth (Gbit/s) 3.96 3.96 3.96 Yes
Maximum audio bandwidth (Mbit/s) 36.86 36.86 36.86 36.86
Resolutions possible over single link HDMI at 24bits per pixel 1920x1080p60 1920x1080p60 1920x1080p60 Yes
RGB Yes Yes Yes Yes
YCbCr Yes Yes Yes Yes
xvYCC No No No Yes
Deep Color No No No Yes
Maximum Color Depth (bits per pixel) 24 24 24 Yes
Consumer Electronic Control (CEC)** Yes Yes Yes Yes
Updated list of CEC commands*** No No No No {1.3a-yes)
Auto lip-sync No No No Yes
8channel/192 kHz/24-bit audio capability Yes Yes Yes Yes
DVD-A support No Yes Yes Yes
SACD (DSD) support **** No No Yes Yes
Dolby TrueHD bitstream capable No No No Yes
DTS-HD Master Audio bitstream capable No No No Yes
Blu-ray/HD DVD video and audio at full resolution***** Yes Yes Yes Yes

* = 36-bit support is mandatory for Deep Color compatible CE devices with 48-bit support being optional.

** = CEC has been in the HDMI specification since version 1.0 but has only begun to be used in CE products with HDMI version 1.3.

*** = Large number of additions and clarifications for CEC commands. One addition is CEC command allowing for volume control of an AV receiver.

**** = Playback of SACD may be possible for older revisions if the signal source (such as the Oppo 970) converts to LPCM. For those receivers that have only PCM DAC converters and not DSD, this means that no additional resolution loss occurs.

***** = Even for audio bitstream formats that a given HDMI revision can not transport, it may still be possible to decode the bitstream in the player and transmit the audio as LPCM.